Aleksandar Kodzhabashev
/
TrackballQuery
An example of using polling PS/2 using the modified mbed PS/2 library
mylib/PS2/PS2Keyboard.cpp
- Committer:
- d3alek
- Date:
- 2014-03-19
- Revision:
- 14:168aa965b1b4
- Parent:
- 0:94cffad90b69
File content as of revision 14:168aa965b1b4:
/** * PS/2 keyboard interface control class (Version 0.0.1) * * Copyright (C) 2010 Shinichiro Nakamura (CuBeatSystems) * http://shinta.main.jp/ */ #include "PS2Keyboard.h" PS2Keyboard::PS2Keyboard(PinName clk_pin, PinName dat_pin) : ps2kb_init(clk_pin, dat_pin), ps2kb(clk_pin, dat_pin) { } PS2Keyboard::~PS2Keyboard() { } bool PS2Keyboard::processing(keyboard_event_t *p) { bool emit = false; const int c = ps2kb.getc(); if (0 <= c) { scancode[count++] = c; switch (count) { case 1: if ((scancode[0] != 0xE0) && (scancode[0] != 0xE1) && (scancode[0] != 0xF0)) { p->type = KeyMake; p->length = count; memcpy(p->scancode, scancode, sizeof(p->scancode)); emit = true; count = 0; } break; case 2: if (scancode[0] == 0xF0) { p->type = KeyBreak; p->length = count; memcpy(p->scancode, scancode, sizeof(p->scancode)); emit = true; count = 0; } if ((scancode[0] == 0xE0) && (scancode[1] != 0xF0) && (scancode[1] != 0x12)) { p->type = KeyMake; p->length = count; memcpy(p->scancode, scancode, sizeof(p->scancode)); emit = true; count = 0; } break; case 3: if ((scancode[0] == 0xE0) && (scancode[1] == 0xF0) && (scancode[2] != 0x7C)) { p->type = KeyBreak; p->length = count; memcpy(p->scancode, scancode, sizeof(p->scancode)); emit = true; count = 0; } break; case 4: if ((scancode[0] == 0xE0) && (scancode[1] == 0x12) && (scancode[2] == 0xE0) && (scancode[3] == 0x7C)) { p->type = KeyMake; p->length = count; memcpy(p->scancode, scancode, sizeof(p->scancode)); emit = true; count = 0; } break; case 5: // Do nothing. break; case 6: if ((scancode[0] == 0xE0) && (scancode[1] == 0xF0) && (scancode[2] == 0x7C) && (scancode[3] == 0xE0) && (scancode[4] == 0xF0) && (scancode[5] == 0x12)) { p->type = KeyBreak; p->length = count; memcpy(p->scancode, scancode, sizeof(p->scancode)); emit = true; count = 0; } break; case 7: // Do nothing. break; case 8: if ((scancode[0] == 0xE1) && (scancode[1] == 0x14) && (scancode[2] == 0x77) && (scancode[3] == 0xE1) && (scancode[4] == 0xF0) && (scancode[5] == 0x14) && (scancode[6] == 0xF0) && (scancode[7] == 0x77)) { p->type = KeyMake; p->length = count; memcpy(p->scancode, scancode, sizeof(p->scancode)); emit = true; count = 0; } break; default: count = 0; break; } count = count % sizeof(scancode); } return emit; }